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Age- and Weight-Based Sizing Chart
Age (or weight)Uncuffed ETTCuffed ETTLaryngoscope bladeDL ETTCVLA-lineLMAFoleyChest tubeSalem Sump
1 kg2.5Miller 005 Fr24 G15 Fr8 Fr
2 kg3Miller 005 Fr24 G15 Fr10 Fr10 Fr
3 kg3Miller 05 Fr24 G15 Fr12 Fr10 Fr
Term newborn3.5Miller 15 Fr24 G15 Fr12 Fr10 Fr
5 kg3.5Miller 15 Fr24 G1.55 Fr12 Fr10 Fr
1 year4Miller 15 Fr24 G1.55 Fr16 Fr10 Fr
2 years4.5Miller/Mac 25 Fr24 G28 Fr16 Fr14 Fr
3 years4.5Miller/Mac 25 Fr22 G28 Fr20 Fr14 Fr
4 years5Miller/Mac 25 Fr22 G28 Fr20 Fr14 Fr
5 years5Miller/Mac 25 Fr22 G28 Fr20 Fr14 Fr
6 years5Miller/Mac 27 Fr22 G2.58 Fr20 Fr14 Fr
7 years5Miller/Mac 27 Fr22 G2.58 Fr20 Fr14 Fr
8 years5.5Miller/Mac 226 Fr7 Fr22 G2.58 Fr20 Fr14 Fr
9 years5.5Miller/Mac 226 Fr7 Fr22 G2.510 Fr20 Fr14 Fr
10 years6Miller/Mac 328 Fr7 Fr20 G2.510 Fr20 Fr14 Fr
11 years6Miller/Mac 328 Fr7 Fr20 G310 Fr24 Fr14 Fr
12 years6Miller/Mac 328 Fr7 Fr20 G310 Fr24 Fr14 Fr
13 years6Miller/Mac 332 Fr9 Fr20 G312 Fr24 Fr16 Fr
14 years7Miller/Mac 332 Fr9 Fr20 G312 Fr32 Fr16 Fr
15 years7Miller/Mac 335 Fr9 Fr20 G412 Fr32 Fr16 Fr
16 years7Miller/Mac 335 Fr9 Fr20 G412 Fr32 Fr16 Fr
17 years7Miller/Mac 335 Fr9 Fr20 G412 Fr36 Fr16 Fr
18 years7Miller/Mac 335 Fr9 Fr20 G412 Fr36 Fr16 Fr

ETT, endotracheal tube; DL, double-lumen; LMA, laryngeal mask airway; Fr, French; G, gauge.

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ETT depth (cm) = three times ETT size (mm ID).

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ETT size (mm ID) = (age [in years])/4 + 4.

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